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US 10,590,300 B2Granted
Composition for coating polymer films, coating process and composite materials obtained
AssigneeToray Films Europe
InventorsKeltoum Ouzineb, Maria Cristina Penache
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Abstract
The invention relates to a composition intended for coating polymer films, making it possible to improve the adhesion between the film and a final coating, and to confer good barrier properties on the coated film. The coating composition comprises at least one acrylic and/or methacrylic polymer which has a gel content of at least 50% by weight, relative to the total weight of acrylic and/or methacryclic polymer, at least one crosslinking agent and at least one polyester comprising sulphonyloxy groups, which is water-soluble or water-dispersible.
Claims20
Coating composition comprising:
- at least one acrylic and/or methacrylic polymer in the form of an already cross-linked latex having a gel content of at least 50% by weight, relative to the total weight of acrylic and/or methacrylic polymer;
- at least one cross-linking agent;
- at least one water-soluble or water-dispersible polyester with sulphonyloxy groups having a content between more than 5% and less than 15% by weight relative to the dry weight of acrylic and/or methacrylic polymer,
- wherein a weight ratio of acrylic and/or methacrylic polymer relative to the cross-linking agent is greater than 75/25 to about 90/10, and,
- wherein the cross-linking agent is added to the already cross-linked acrylic and/or methacrylic polymer to allow interfacial cross-linking between the acrylic and/or methacrylic polymer and the cross-linking agent so as to form particles of acrylic and/or methacrylic polymer and cross-linking agent.
2 more elements
Dependencies are inferred from the claim text.